摘要
ＡＴＭ 、的出现使得我们能够实时地、高效地传输视频信息，但同时在传输过程中ＡＴＭ 的信元丢失将导致解压缩后的图像质量严重下降。文章首先基于ＭＰＥＧ２ 标准，给出了一个基本的视频通信系统框架及各部分的码流格式，然后分析了系统中信元丢失的原因、特点和影响。文中给出了现有的各种减少信元丢失的方法及其如何隐藏信元丢失对图像质量造成的影响，分析其优劣和适用场合，并讨论了以后的研究方向。
The appearing of ATM makes it possible to transfer the video stream real timely and efficiently.At the same time, the cell loss of ATM induces the serious digression of image quality.Firstly, the paper shows a system structure of video over ATM based on MPEG 2 and the format of code streams.Then the cause of cell loss in ATM as well as its characteristic and impact on the system is analyzed.A review is given in the paper about the available measures to deduce the cell loss and to conceal the error in decoded video caused by cell loss.Their merits and demerits are compared and the discussion of the future study is presented at the end of the paper.
出处
《电信科学》
EI
北大核心
1999年第10期9-12,共4页
Telecommunications Science
